Single file sync on desktop client

Hello,

I have a single config file that I would like to share among multiple machines. It lives in a folder that has many other files, none of which need to be synced. None of these files can be moved. Can I sync this single file to my desktop without including all the other files? It seems like this should be easy and basic, but I could not figure it out immediately. I thought of making a bunch of ignore rules for the other files, but it seems like there should be a better way.

Using linux mint 19.3, NC client 2.6.4 appimage.

Thank you!